问题
I was just wondering, how many components can be added to a UIPickerView?
回答1:
Technically, NSObject inherited objects can hold up to NSUIntegerMax objects (this is the largest value that can be returned from count). On a 32-bit system like the iPhone, that is a little over 4 billion. On a 64-bit system like most Macs/iPhone5S, it is many orders of magnitude higher.
I suspect you will run out of RAM before you hit this CS limit.
来源：https://stackoverflow.com/questions/20241305/how-many-maximum-number-of-components-can-be-there-in-uipickerview